Small green wall improves sidewalk

Across from the 246 elevated freeway in Meguro I saw this simple green wall make of ficus vine. It only extends one story high, but it provides a nice experience for pedestrians on the sidewalk. Along with the typical ginko street tree and azalea bushes between the sidewalk and road, the wall uses minimal space to provide a green corridor. Apart from occasional trimming, I imagine it’s very low cost and low maintenance.